… For a given power series, the upper bound ρ of | z - c | for z at which it converges is called the convergence radius, and the circle | z - c | = ρ is called the convergence circle. There is the following formula (Cauchy-Hadamard's formula). When 0 < ρ ≦ ∞, the power series converges absolutely within the convergence circle, and for any ρ' < ρ, it converges uniformly at | z - c | ≦ ρ'. … *Some of the terminology that mentions the "Cauchy-Hadamard's formula" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 与えられたべき級数において,それが収束するようなzに対する|z-c|の上限ρを収束半径といい,円|z-c|=ρを収束円という。次の公式(コーシー=アダマールの公式Cauchy‐Hadamard’s formula)がある。 0<ρ≦∞のとき,べき級数は収束円内で絶対収束し,また任意のρ′<ρに対して,|z-c|≦ρ′で一様収束する。… ※「Cauchy-Hadamard's formula」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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